Carbureter.



S. D. WALDON.

CARBURETER.

APPLICATION FILED APR. 15, 1912.

I 1,22OA78n Patented Mar. 27,1917.

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1 22@ 4178 Specification of Letters Patent. Pafggmtgdl Mar, 37 191 Application filed April 15, 1912. Serial No. 690,847.

ToaZZ whom it may concern." chamber 16 and surrounds the choke tube Beit known that I, SIDNEY D. WALDON, 15. The float 23 is connected with one end a citizen of the United States, and resident of the lever 24, said lever being pivoted of Detroit, county of Wayne, and State of M25 and having its opposite. end connected Michigam have invented certain new and with the valve 18. Arranged at one side 60 useful Improvements in Carbureters, of of the float chamber 16 is the main air sup- '-which'the following is aspecification. ply passage 26. This passage preferably This invention relates to hydrocarbon extends vertically along the side of the motors and more particularly to the carchamber 16 and has its lower end turned bureter and means for controlling the air horizontally and in communication with the. 65 and hydrocarbon supply thereto. lower-end of the choke tube 15. A passage The principal object pf the invention is 27 leads from-the bottomof the chamber to produce a carbureter that will supply 16 to a point below the horizontal portion the proper mixture of hydrocarbon and air of the passage 26 and is separated from to the motor at all speeds of the motorand the latter passage by the wall 28. A nozzle 70 under all climatic conditions. 29 extends longitudinally of the choke tube It is a well known fact that the ordinary 15 and has its lower end extending through type of carbureter works best in warm the wall '28 and in communication with the weather and it is the object of this invention passage 27. The nozzle 2 may have a to so construct and arrange the parts of screw threaded connection wi h'the wall 28 7 the carbureter as td reproduce/as nearly as and for the purpose of inserting and re may be summer conditions in and around vmoving said nozzle a plug 30 may be ar- *the carburetor. ranged in the outer wall of the passage 27.

Other objects, and the features of novelty The upper end of the nozzle 19 is prefer- 2 of the invention will be apparent from the ably arranged in the contracted portion of 93 following description taken in connection the choke tube 15 and on a level with the with the accompanying drawings, in which, surface of the hvdrocrbon' in the chamber Figure 1 is a vertical sectional view of 16. For the purpose of draining the pasthej carbureter shown in connection with sage 26 a suitable valve 31 may be arranged 30 fragments of the intake pipe and exhaust at the lowest point of said passage. 1 e 85 header of the hydrocarbon motor; and The mixing chamber casting is preferably 5 ig. 2 is a plan of the float chamber castprovided with a partition 32 which separates ing of the carbureter. the horizontal portion '14 of the mixing In the drawings, 10 indicates the intake chamber'from' the passage 33 andapartition 35 pipe of a hydrocarbon motor and 11 the- 34 arranged at the end of the horizontal 90 exhaust header of the same. Communicatportion 1401 the mixing chamber separates ing with the, intake pipe 10 is a mixing the latter from the air supply passage 35. chamber 12 which issurrounded by a water A valve cage 36 is secured in'the mixing jacket 13. The mixing'chamber 12 has the chamber casting and carries an auxiliary lower portion thereof extending ,horizonair inletv valve 37 arranged directly above 95 tally, as indicated at 14, and in communi-f the choketube .5 and in close proxlmity to a cation with the usual choke tube 15. The the upper end of the same. .The valve cage choke tu e 15 may be of any preferred.v con- 36. is provided with a suitable seat for the struction and is preferably .arrangedcenvalve 37 and also with openings 38 in its trally of the float chamber 16. The float wall adapted to establish communicationbechamber. 16-is preferably cylindrical in form tween the passage 33 and the interior of the and has an extensionl? at one side thereof cage above the valve 37. A stem 39 is sein which is arranged the hydrocarbon sup-' cured to the val-v'e 37 and has at its upper ply valve 18. -A partitiim 19 is arranged -end an abutmenteiO which is engaged by a in the'lower partof the extension ljiand spring 41,'the'lower end of this spring bear- ,1 5

' orms a chamber 20with which the supply ing againstiabeveled collar 42 which s slid-' pipe 21 communicates. The partitiop 1 93 abyarranged on a sleeve 43. A spr ng 44- may be provided with a port'22'in WhlCh ls' surrounds the stem 39 within the sprmg ll arranged a suitable seat forthe valve 18., andhas'lts lower end 1n engagement wlth A annular-float 23'is arranged in the float the upper end of the sleeve 43. The upper 11o end of the spring 44 slight distance below the abutment 40 when the valve 37 is closed. The lower end of the sleeve 43 is beveled and coiiperates with a wedge 45 which is slidably arranged on the upper side of the cage 36. An abutment 46 is arranged on the top of the cage 36 above the Wedge 45 and supports a wedge 47 which cotiperates with'the beveled collar 42. The tension of the spring 41' and the point at which thespring 44 becomes active may be varied by means of the wedges 47 and 45 respectively. For the purpose of actuating the wedges 45 and 47, the operating rods 48 and 49 are connected with the wedges and may extend to any convenient point. In the outer wallof the passage 33 is an auxiliary air opening 50. Adjacent this opening is a to be swung across the passage 33 to close the opening 50 or cut the passage 33 off from the passage 35. The valve 51 has an operating arm 52 connected therewith,-this aim being connected with an operating rod 53. It will be seen that by this construction the valve 51 may be swung to various intermediate posi lons so that the passage 33 may be partially in communication with the opening 50 and with the passage 35. hood or guard54 may be arranged over the opening 50.

Surrounding the exhaust header 11 is a jacket 55 which provides an annular cham- The jacket 55 may her around theheader. be provided with perforated end walls 56 and 57 which permit air to pass freely to the interior of the jacket. A pipe 58 has one end in communication with the interior of the jacket 55 and has itsother end in communication with the chamber 35. At any convenient point along the pipe 58 may be arranged a sleeve'valve 59 having openings 60 which are'adapted to register with corresponding openings in the pipe 58. It will thus be seen that the pipe 58 serves as an air, supply pipe to the carbureter and that the pipe receives air from the interior of the jacket 55. In the operation of the engine the exhaust header is ordinarily in a highly heated condition and the air passing through the jacket 55 will therefore be heated .to a considerable degree and thus be delivered to the carbureter at a much higher temperature than the external atmosphere. In or der to regulate the temperature of the air delivered to the carbureter, the valve 59 may be adjusted to admit cold air directly to the pipe 58 where it mixes with the hot. air,

from the jacket 55, and reduces the tem- 'perature.

. In constructing the carbureter I prefer to make the float chamber casting separate from the mixing chamber casting and secure the two together in any The pipe 5 8 is also preferably separate'fr'om is arranged to be a flap valve-51 which is adapted suitable manner.

and secured to anges 61 and 62 the mixing chamber castin the latter by means of the and the screws 63.

The operation of the carbureter is as follows: The hydrocarbon or gasolene is supplied to. the chamber 20 by meansof the pipe 21 from any suitable storage tank. When the valve 18 is open the gasolene passes into the float chamber 16 and fills the same to a point where the flange 18 is closed by the float 23. The gasolene will fill the passage 27 and rise in the nozzle 29 to the upper end of the latter. Since the upper end of the nozzle 29 is substantially on a level with the gasolene in the chamber 16, it will be seen that when the pressure in the mixing chamber 12 and choke tube 15 is reduced by the motor suction, the gasolene will be disthe pipe 58 will be heated in the jacket 55,

and have a temperature which will effect a thorough vaporization of the gasolene.

The efiect of the motor suction may be re ulated by means of the butterfly throttle valve 64 arranged in the upper part of the mixingchamber 12. When it is desired to start the motor it is preferable to have the throttle 64 wide open and to limit the supply of air to the choke tube. The supplyof air to the choke tube may be regulated by means of a butterfly throttle valve 65 arranged in the passage 26. In order to prevent a complete closure of the passage 26, the throttle 65 may be provided with a small opening 66 which amount ofair to pass therethrough. When the motor is running at moderate speeds all of the air willbe drawn through the passage 26 and the choke tube 15 butwhen the motor is running at high speeds the suction will 11.3.

overcome the tension of the spring 41 and open the auxiliary air inlet valve 37 thereby admitting air directly to the mixing cham-- ber 12. As the suction increases the quantity of gasolene discharged by the nozzle 29 also increases and therefore it is desirable to have under such circumstances means for effectively atomizing the gasoline. From the drawing itlwill be seen that the current of air and tube 15 will strike the lower side of the valve 37 and cause the gasolene to be so thoroughly atomized that it will form a perfect mixture with the air passing through the choke tube and the auxiliary valve 37. By having the auxiliary valve located directly over the out let end tr the choke tube, the valve not only acts as a bafiie to thoroughly break up and atomize the gasolene, but also tends to limit the quantity of air passing through the the choke tube 85 will always allow a small 105 gasolene delivered from the choke 120 -30 regulate the temperature of the air ma am considerably higher temperature than the external atmosphere, but the air passing through the auxiliary valve 37 will be/received through-the opening 50 and the passage 33 and will be of substantially the same temperature as the external atmosphere. If

it is desired to have all of the air with which the gasolene is mixed as hot as possible, the valve 51 will be swung upwardly from the position shown in Fig. 1 to the position Where it closesthe opening 50 and thus establishes communication between the passage 33 and the pipe 58. In this position of the valve 51 all the auxiliary valve as well as theair passing through the choke tube will be derived from the pipe 58. From the two extreme positions of the valve 51 above mentioned, it will be seen that this valve may be set at any desired intermediate position and thereby passing through the auxiliary valve 37..

By having the upper end of'the spring 44: arranged a slight distance below the abutment 40, this spring will act as a buffer and 35 tend to limit the amount of opening of the v valve 37.

44 will be such that when the motor is running at very high speeds this spring will also be compressed and permit the valve 37 40 to be opened to the extent necessary to supply the required amount of air to the mixing chamber 12. 7

-When the carbure'ter is used on a motor vehicle, the throttle 65 is preferably operated by means of a rod 67 which extends to any 'convenientpoint at the front of the vebible, and the rods 48, 49 and 53 extend to the dash of the vehicle where they may be conveniently operated.

Ordinarily when the motor is stopped a certain amount of gasolene will collect in the lower part of the passage 26 and form a convenient supply which will be readily available to provide a rich mixture for the 55 motor when the same is started again.

It will be understood that various changes maybe made in the details within the scope of the appended claims and therefore I do not wish to be limited to the precise details i shown and described. p Having" described my invention what I 4 claim and is, 11. In a carbureter, the comblnat on of a desire to secure by'Letters-Patent choke tube, a fuel nozzle therein, an air of the air passing through However the tension of the spring" said supply passage for the choke tube, a mixing chamber'in communication with the choke tube, an auxiliary: air inlet passage for said mixing chamber, a valve adapted to close said auxiliary air inlet, an air supply conduit communicating with said first mentioned air passage and said auxiliary air inletpassage, and an opening from the lat ter passage to the external atmosphere.

In a carbureter, the combination of a choke tube, a fuel supply nozzle therein, an air passage communicating with the choke tube, a mixing chamber communicating with the choke tube, an auxiliary air inlet passage for the mixing chamber, an opening from the latter passage to theexternal atmosan air supply conduit communicating phere, with said'first mentioned air passage and said auxiliary air inlet pamage, and valve means adapted to regulate the quantities of air supplied to the said auxiliary air inlet passage through the said opening and said conduit.

3. In a carbureter, the combination of a choke tube, a fuel supply nozzle therein, an air passage communicating with the choke tube, a mixing chamber communicating with the choke tube, an auxiliary air inlet passage for the mixing chamber, an opening from the 'latter passage to the external atmosphere, an air supply conduit communicating with said first mentioned air passage and said auxiliary air inlet passage, and a valve adapted to close said opening or cut off communication between said air conduit and said auxiliary air inlet passage.

4. In a carbureter, the combination of a choke tube, a fuel :supply nozzle therein, an air passage communicating with the choke tube, a mixing chamber communicating with the choke tube, an auxiliary air inlet passage for the mixing chamber, an opening from the latter passage to the external atmos-' phere, an air supply conduit communicating with said first mentioned air passage and said auxiliary air inlet passage, and a valve adapted to regulate the quantities of air supplied to said auxiliary air inlet passage through said opening and said air supply conduit. p T

5. Ina carbureter, the combination of a choke tube, a nozzle therein, an air supply ,passage communicating with the choke tube, a mixing chamber communicating with the choke tube, an auxiliary air inlet for the mixing chamber, a valve adapted to close said inlet and also regulating the flow 'through the choke tube, a plurality of springs adapted tore ulatethe opening of said valve, and in ependently actuated Wedge devices for adjusting the action of sprin' 6. The combination ofair heating means,

a carbureter having main and auxiliary, air

inlet passages, a' pipe establishing communinew ' cation between said means and both of said inlet passages, said auxiliary passage having an opening to the external atmosphere, a

pipe establishing communication between said means and both of said passages, and

means for regulating the temperature of the air supply through said auxiliary passage by varying the amount of air admitted directly thereto from the external atmosphere.

8. Thecombination of air heating means,

a oarbureter having main and auxiliary air a pipe establishing communiinlet passages,

cation between said means and both of said passages, means for regulating the temperature of the air in said pipe, and additional means for regulating the temperature of the air in said auxiliary passage.

9. The combination of air heating means, a carbureter having main and auxiliary air inlet passages, a pipe establishing oommuniv cation between said means and both of said passages, means for admitting air from the external atmosphere to said pipe in varying amounts to regulate the temperature of theair in said pipe, and means for admitting air from the external atmosphere to said auxiliary passage to regulate the tempera- "ture of the air therein.

In testimony whereof I affix my signature in presence of two witnesses.

r SIDNEY D. WALDON. Witnesses:

W. 1-1;, FINCKEL, Jr., GEO. A. SCHROEDER. 

